National Cyber Awareness System

Vulnerability Summary for CVE-2007-4840

Original release date:
09/12/2007

Last revised:
03/07/2011

Source:
US-CERT/NIST

Overview

PHP 5.2.4 and earlier allows context-dependent attackers to cause a denial of service (application crash) via (1) a long string in the out_charset parameter to the iconv function; or a long string in the charset parameter to the (2) iconv_mime_decode_headers, (3) iconv_mime_decode, or (4) iconv_strlen function. NOTE: this might not be a vulnerability in most web server environments that support multiple threads, unless these issues can be demonstrated for code execution.

We do not consider this to be a security issue. For more information please see
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169857#c1
and http://www.php.net/security-note.php

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